Mathias J. Rummel, M.D., Ph.D. Head of Hematology Dr. Mathias J. Rummel, is the head of the Department for Hematology at the Clinic for Hematology and Medical Oncology at the Justus-Liebig University-Hospital, Gießen, Germany. Dr Rummel studied medicine at J.W. Goethe University Hospital in Frankfurt, Germany. There he also completed his residency, obtained board certification in internal medicine, and was awarded his PhD. Dr. Rummel’s research focuses on novel treatment approaches in hematological malignancies, most notably follicular and other indolent lymphomas as well as hairy cell leukemia and also ITP. He is principal investigator of many clinical trials in leukemia and lymphoma, and has published several book chapters and papers in peer-reviewed scientific journals.